'I have lived one crazy life so far,' Oregon mall gunman says on Facebook

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The central image on Roberts' Facebook page was a work by street artist Banksy

The gunman's mother died at childbirth; he never met father, a friend says

He told a friend he left his aunt's home at age 14 and raised himself

Jacob 'Jake' Roberts uses edgy, dark humor on his Facebook page

Intended or not, the central image on the Facebook page of Jacob "Jake" Roberts, the Oregon shopping mall gunman, is haunting.

A "Follow Your Dreams" slogan painted on a wall is stamped "Cancelled" in red -- a work by famed street artist Banksy.

Describing himself, Roberts made an attempt at humor.

"Hey what's up guys my names Jake and I'm an alcoholic... Lol just kidding," Roberts wrote in the first line of his introduction, which included grammatical errors. "If you were to ask someone that knows me they would probably say that I am a pretty funny person that takes sarcasm to the max.

"I'm the conductor of my choo choo train," he continued. "I may be young but I have lived one crazy life so far."

Authorities have released a photograph of Roberts, 22, who wore a hockey-like face mask as he shot at holiday shoppers Tuesday at the Clackamas Town Center in Happy Valley, Oregon, near Portland. He killed two people and then himself.

One of his Facebook friends, Brittany Curry, 21, told CNN she dated Roberts for five months last year. They met through mutual friends in the Portland area, she said.

Gunman opens fire in Oregon mall 11 photos

Gunman opens fire in Oregon mall11 photos

Gunman opens fire in Oregon mall – Flowers and candles sit outside the Clackamas Town Center mall in Clackamas, Oregon, on Thursday, December 13. The Clackamas County Sheriff's Office identified Jacob Tyler Roberts, 22, as the gunman who entered the mall with a AR-15 semiautomatic assault rifle, killing two and wounding another before taking his own life.

Roberts told Curry that his mother died at childbirth and he never met his father, she said. He left his maternal aunt's home at age 14, Curry said.

"He raised himself," Curry said. "He was doing it all on his own."

A friend from high school, Jordan Salazar, said she understood that Roberts' parents were not present in his life. He was a skateboarder back then, she said.

"In high school Jake was a nice guy, outgoing," Salazar told CNN.

"I saw him a few times in the last year. He seemed normal" and a "good guy," she added.

Roberts valued his friends, Curry said.

Roberts wrote on his Facebook page: "My friends are my family and I don't think that will ever change. I have done a lot for myself in the past year some good and some bad but I still press on.

"I like hanging out with my friends and having a good time maybe get a little drunk every now and then. I like to think of myself as a bit of an adrenaline junkie... Yup that's right I'm a junkie lol. But I'm just looking to meet new people and see the world," Roberts typed.

When they were dating, Roberts was living in an apartment across from the Clackamas Town Center mall, Curry said.

Roberts wanted to be a firefighter and was taking classes at Clackamas Community College, Curry said.

"It was always his dream," Curry said.

In the meantime, he had been working as a cook at Big Bertha's gyro eatery in Portland for more than two years, Curry said.

About that job, Roberts commented on Facebook: "Right now I work at the most badass gyro shop in town. I am one of the few people that can say I love my job and actually mean it."